Outsole for a shoe



FIG. 1 is a bottom plan view of an outsole for a shoe showing my new design;

FIG. 2 is a top plan view;

FIG. 3 is a right side elevational view;

FIG. 4 is a left side elevational view;

FIG. 5 is a rear elevational view; and

FIG. 6 is a front elevational view. 

The ornamental design for an outsole for a shoe, as shown. 